Water-soluble pyrazolone azo dyestuffs derived from phthalocyanine

ABSTRACT

Dyestuffs of the formula:   IN WHICH Pc represents the copper phthalocyanine residue, X represents an -OH or -NH-alkyl-OH group, Y represents a methyl or carboxyl group, the benezene ring Z may be substituted by at least one halogen atom or alkyl or sulpho group, m represents an integer from 1 to 4, and n represents an integer from 0 to 3, the sum m+n being equal to 4, and the possible substitutents of the ring Z may be the same or different when m is equal to or greater than 2. These dyestuffs are suitable for the dyeing of animal fibers, for example, leather in bright shades ranging from green to blue and the colorations are very uniform and remarkably fast to light, washing and solvents.

United States Patent [72] Inventors Andre Louis Sailer;

Pierre Frank, both of Saint Clair du Rhone. France [21 1 Appl. No. 729,368 [22] Filed May 15, 1968 [45] Patented Nov. 23, 1971 [73] Assignee Ugine Kuhlmann Paris, France [32] Priority May 17, 1967 [33] France [31] 106,642

[54] WATER-SOLUBLE PYRAZOLONE AZO DYESTUFFS DERIVED FROM Pl-ITHALOCYANINE 3 Claims, No Drawings [52] US. Cl 260/ 147, 8112.5, 8/13, 8/43, 260/163, 260/314.5 [5l 1 int. Cl C09b 45/48, D06p 1/10 [50] Field ot'Smrch 260/l47 5 6] References Cited UNlTED STATES PATENTS 3,133,050 5/1964 Von Tobel 260/147 X 3,445.449 5/1969 Meininger et al. 260/147 Primary ExaminerFloyd D. Higel Alrorney- Beveridge & De Grandi ABSTRACT: Dyestuffs of the formula:

e -CH. OH

in which Pc represents the copper phthalocyanine residue. X represents an -OH or -NH-alkyl-OH group, Y represents a methyl or carboxyl group the henezene ring Z may be substituted by at least one halogen atom or alkyl or sulpho group, m represents an integer from 1 to 4. and n represents an integer from 0 to 3. the sum m+n being equal to 4. and the possible substitutents of the ring Z may be the same or difi'erent when m is equal to or greater than 2. These dyestuffs are suitable for the dyeing of animal fibers. for example, leather in bright shades ranging from green to blue and the colorations are very uniform and remarkably fast to light. washing and solvents.

WATER-SOLUBLE PYRAZOLONE AZO DYESTUFFS DERIVED FROM PHTHALOCYANINE The present invention relates to new dyestuffs of the general in which Pc represents a copper phthalocyanine residue, X represents an -OH or -NH-alkyl-OH group, the alkyl chain preferably containing one to seven carbon atoms, Y represents a methyl or carboxyl group, the benzene ring Z may be substituted by at lease one halogen atom or alkyl or sulfo group m represents an integer from 1 to 4, n represents an integer from to 3, the sum of m+n being equal to 4, a'n'd the possible substituents of the ring Z being the same or difi'et'ent when m is equal to or greater than 2.

The dyestuffs of the general formula (I) may be prepared for example by diazotizing an amine of the formula:

(III) in formulas (ll) and (III), the definitions of Pc, X, Y, m and n and the possible substituents of the ring 2 are as defined above. The amines of formula (ll) may be prepared for example by. condensing copper phthalocyanine tetrasulfochloride with a diaminobenzenesulfonic acid, possibly in the presence of an amine of formula H,N-alkyl-Ol-l wherein the alkyl chain preferably contains one to seven carbon atoms. The sulfo chloride groups which may remainafter the condensation are converted into sulfonic groups by alkaline hydrolysis.

The dyestuffs of general formula (I) may also be prepared for example by condensing copper phthalocyanine tetrasulfochloride with dyestufis of the formula:

possibly in the presence of an amine of formula H,N-alkyl- OH, the sulfochloride groups which remain being converted into sulfonic groups by alkaline hydrolysis. ln formula (IV) the possible substituents of the ring Z are as defined above.

The dyestuffs of formula (IV) may be prepared for example by diazotizing an amino-acetylaminobenzene-sulfonic acid, coupling the diazo derivative with a pyrazolone of formula (III) and deacetylating.

The dyestuffs of general formula (I) dye animal fibers. They are especially suitable for dyeing leatherstanned by various methods. Bright shades ranging from green to blue are obtained. The colorations are very uniform and remarkably fast to light, washing and solvents. The aqueous solutions of the dyestufi's of the invention are very stable on keeping and insensitive to acids and bases.

The invention is illustrated by but not limited to the following examples in which the parts indicated are parts by weight unless the contrary is stated.

EXAMPLE I A. 128 parts of copper phthalocyanine are introduced in a period of 30 minutes into 600 parts of chlorosulfonic acid, the mixture is heated to 140 C. and maintained at this tempera turefor 2 hours. It is allowed to cool to 120 C., then lOO parts of thionyl chloride are added over a period of an hour, and the mixture is maintained for an hour at l20 C., and allowed to cool. The cold reaction massis run on to 6,000 parts of water containing 2,800 parts of ice and 200 parts of sodium chloride. The copper phthalocyanine tctrasulfochloride thus obtained is filtered off and washed with 600 parts of a 3 percent solution of hydrochloric acid.

The precipitate is taken up in L000 parts of water, stirred for 10 rtiin'u'tes so as to obtain a homogeneous suspension, then-a solution of 423 parts of l ,3-diamino-benzene-4sulfonic acid in 800 parts of water isadded. The mixture is stirred for 4 hours, a 40 percent solution of sodium hydroxide is gently run in to bring the pHt'o 6.5 and 70 parts of sodium bicarbonate are added. STirring'is then continued for 12 hours. The amine is precipitated by the'addition of sodium chloride and acidifil NH:

B. 106.6 parts of this amine are dissolved in 500 parts of water'by means of a40 percent solution of sodium hydroxide in an-amount such that the pH of the solution'is 7.5. 6.9 parts of sodium nitrite'in aqueous solution are added to the above solution, then the mixture is run on to a mixture of 200 parts of water. parts of ice and 30 parts of 20. B. hydrochloric acid. Diazotisation is effected over a period of an hour at 5 C., then-the diazo'derivative is slowly-introduced into the solution obtained by dissolving, at pH 7, 34 parts of 2, 5'- dichloro-4'-sulfol phenyl-3-methyl-5-pyrazolone in 300 parts of water with 30 parts of sodium carbonate. When the coupling'is completed, the dyestuff is precipitated byacidification'and the'addition of sodium chloride. The'[4'-sulfo-2, 5-dichlo'ro-l-phenyl-3-methyl-S-hydroxy-pyrazole] 4 azo 3' [4' sulfo-phenylaminosulfonyl-copper trisulfophthalocyanie] is dried. It is in the fo'rmof a green powder which dissolvesinwater to give a green solution, and dyes leathers from various tannings in very bright yellowish-green shades. These have excellent fastness tolight. washing,'solvents, rubbing and velourfinishi'ng.

EXAMPLE 2 lf-i'ri the process describedin paragraph A of example I. 42

parts of 'monoethanolamine are added after the addition of the Nil; (Vl) lf' inthe process of paragraph B of example I, the 106,6 parts of the amine of formula (V) are replaced by l l9.5 parts ofthe amine of formula (VI), [4'-sulpho-2 5'-dichloro-lphe'nyl-3-methyl-5-hydroxy-pyrazole1 '4-azo 3' [4'- sulfo phenylaminosulfonyl-tris-(fi hydroxy-ethylaminosulfo- 4'-sulfo l -phenyl-3-methyl-5-hydroxy-4-pyrazolyl nyl)-copper phthalocyanine] is obtained. After filtering off and drying, this dyestuff is in the form of a green powder which dissolves readily in water and dyes leathers from various tannings in green shades which are slightly more blue than those obtained with the dyestuff of example 1. These shades have a remarkable fastness to light, washing, solvents, rubbing and velour finishing.

Table I gives other examples of dyestuffs prepared in an analogous way to the above; the amines used are indicated by [f in the process of paragraph A of example I, the 42.3 parts of l,3-diamino-benzene-4sulfonic acid are replaced by 84.6 parts of the same product than there is obtained, operating in a similar way, an amine of the formula:

S O,NH- S H] l NH, 2

If in the process of paragraph B of example l, the amine of formula (V) is replaced by 61.8 parts of the diamine of formula (Vlll), a dark green powder is obtained which readily dissolves in water. The formula of this dyestuff is as follows:

" In this formula, ii, and R each represent a 2', -dichlororesidue. This dyestufl' dyes leathers from various tannings in green shades which are slightly yellower than the shades obtained with the dyestuff of example 1 and have analogous properties.

Table [1 gives further examples of dyestuffs of the above type which were prepared in a similar way from the diamine of formula (VlI) using a mixture of two different coupling compounds (example 7) or a single coupling compound (example 8).

TABLE II Coupling compound Shade on Example R R, leather 7 2,5'-dichloro4- 4-sulpho-l-phenyl-3- Yellowsulpho-l-phenyl-iimethyl-S-pyrazm green. methyl-5-pyrazolone. lone. 8 4sulpho-1-phenyl-3- do Green.

methyl-5-pyrazolone.

EXAMPLE9 If the procedure in paragraph A of example 1 is carried out; but with 84.6 parts of l,3-diamino-benzeneH-4-sulfonic acid and 28 parts of monoethanolamine, the diamine of the following formula is obtained;

If in the process described in paragraph B of example i the amine of formula (V) is replaced by 66.] parts of the amine of formula (Vlll), a dark green powder is obtained which is bis- (13 -hydroxyethylaminosulfonyl )-bis-( 2' ',5"-dichloro-4' '-sulfol'-phenyl-3'-methyl-5-hydroxy-4'-pyrazolyl-3-azo-4-sulfophenylaminosulfonyl)-copper phthalocyanine. This dyestuff gives green sh'ades on leathers from various tannings, which are slightly more blue than those obtained with the dyestufi" of l5 example 6 and are ofimproved fastness.

EXAMPLE On proceeding according to paragraph B of example I, but replacing the amine of formula (V) by the diamine of formula (Vlll) and coupling with 4'-sulfo-l-phenyl-3-methyl-5- pyrazolone, a dyestufi is obtained which dyes leathers from various tannings in green shades.

EXAMPLE I 1 On proceeding as in paragraph A of example 1. but using 126.9 parts of l,3-diamino-benzene-4-sulfonic acid. the triamine of the following formula is obtained:

140.6 parts of the triamine of formula (IX) are diazotizcd in the presence of 20.7 parts of sodium nitrite and the hexazo derivative is coupled with 76.2 parts of 4'-sulfo-lphenyl-3- methyl-S-pyrazolone. The trisazo dycstuff obtained, namely the tris-( 4"-sulfol -phenyl-3 '-methyl-5'hydroxy-4'pyrazolyl- 40 3-azo-4-sulfophenylaminosulfonyl l-copper sulfophthalocyanine, is in the form of a dark green powder which dyes leathers from various tannings in green shades having remarkable fastness to light. washing, solvents, rubbing and velour finishing.

EXAMPLE 12 On operating as in paragraph A of example I, but using 169.2 parts of l,3-diamino -benzene-4-sulfonic acid, the tetramine ofthe formula is obtained.

On diazotizing this tetramine and coupling the octazo derivative with 2, 5'-dichloro-4-sulpho-l-phenyl-3-methyl-5- various tannings in yellowreen shades.

E AMPLE 13 The phthalocyanine tetrasulfochloride prepared as indicated in example l from 128 parts of copper phthalocyanine is taken up in 1.000 parts of water. A solution at pH 7 of 100 parts of [3-amino-6-sulpho-benzene] l azo 4 [4'- sulphol -phenyl-3-methyl-S-hydroxy-pyrazole] in 500 parts of water is introduced into the above suspension. The mixture is stirred for 3 hours. a solution of sodium hydroxide is added to bring the pH to 6.5-7. then 70 parts of sodium bicarbonate are added. The mixture is stirred for a further 12 hours, then the green dyestufi obtained is separated by acidification and the addition of sodium chloride. This dyestuff is identical with the dyestuff of example 4. 75

pyrazolone, a dyestuff is obtained which dyes leathers from EXAMPLE 14 If besides the 100 parts of monoazo dyestuff, 28 parts of monoethanolamine are added in the preceding example, the same dyestufi' as in example 5 is obtained.

EXAMPLE 15 If the 100 parts of azo-pyrazole in example 13 are replaced by 107 parts of [3-mino-6-sulpho-benzene] 1 azo 4 [4- sulpho-l-phenyl-3-carboxy-5-hydroxy-pyrazole1, the same dyestuff as in example 3 is obtained.

We claim:

1. A dyestuff of the formula:

are the same or different.

2. The dyestuff which in the state of free acid has the formuwherein Pc represents copper phthalocyanime.

3. The dyestuff which in the state of free acid has the formula:

wherein Pc represents copper phthalocyanine.

i i i I 

2. The dyestuff which in the state of free acid has the formula:
 3. The dyestuff which in the state of free acid has the formula: 